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Complete Guide to Bearing Repair: Methods, Materials, and Equipment

I. Necessity of Bearing Repair

In industrial production and machinery operations, bearings are key transmission components. However, over time, bearings can suffer from wear, peeling, cracking, or even failure due to friction, load, temperature changes, and other factors. For high-value, large, or special-purpose bearings, direct replacement is often costly, making bearing repair a more economical and efficient option. Proper bearing repair methods can extend the service life, reduce downtime, improve production efficiency, and lower maintenance costs.

II. Methods of Bearing Repair

1. Plastic Deformation Method

The plastic deformation repair method is mainly applicable to slightly worn bearing components, such as raceways and rolling elements. Through cold pressing, rolling, or milling processes, the geometric accuracy of the bearing surface can be restored. This method is suitable for light surface damage but cannot repair deep cracks or severe deformation.

2. Mechanical Repair Method

The mechanical repair method uses turning, grinding, and polishing techniques to repair damaged areas. It is suitable for bearings with localized severe wear on the raceways, but still worth repairing. This method offers high precision, but may cause changes in bearing size, requiring subsequent processing.

3. Thermal Spraying Repair Method

The thermal spraying method uses various spraying techniques to repair the bearing's surface, restoring dimensions and wear resistance. It is effective for bearings with serious wear on the raceways but still repairable.

4. Electroplating Repair Method

Electroplating technology uses electro-deposition processes to deposit a uniform metal coating on the bearing surface, restoring dimensional accuracy and wear resistance. This method is suitable for high-precision bearings, especially those where slight wear has caused dimensional out-of-tolerance.

5. Bearing Repair Agents and Repair Adhesives

For surface scratches, cracks, or slight wear, bearing repair agents or bearing repair adhesives can be used.

6. Bearing Replacement and Refurbishment

When bearings are severely damaged and cannot be restored by conventional repair methods, methods such as replacing rolling elements and refurbishing inner and outer rings can be used for bearing refurbishment. Refurbished bearings are typically suitable for custom bearings in large equipment, while standard bearings are often more cost-effective when directly replaced.

III. Bearing Repair Materials

Different bearing repair methods require matching repair materials to ensure the stable performance of the repaired bearing.

Bearing Repair Agents Suitable for filling worn areas to improve bearing surface wear resistance
Bearing Repair Adhesives Suitable for high-temperature, heavy-load, and other special working conditions
Thermal Spraying Materials Such as nickel alloys, chromium alloys, suitable for surface strengthening
Electroplating Materials Such as nickel, copper, cobalt alloys, improving bearing wear resistance

IV. Bearing Repair Equipment

Efficient bearing repair requires the support of advanced equipment. Common equipment includes:

Precision Grinding Machine Used for fine grinding of bearing surfaces to ensure repair accuracy
Thermal Spraying Equipment Used for metal coating repair to improve bearing wear resistance
Electroplating Equipment Suitable for fine-tuning repairs, commonly used for high-precision bearing repair
Ultrasonic Flaw Detector Detects internal cracks in bearings, ensuring repair quality

V. How to Choose a Bearing Repair Manufacturer?

Choosing the right bearing repair manufacturer is crucial. How to choose:

Qualification Certification Verify if the manufacturer has passed ISO quality management system certification
Technical Strength Check repair cases and assess repair capabilities
Advanced Equipment Prefer manufacturers with modern repair equipment
After-Sales Service Manufacturers offering inspection, warranty, and technical support are more reliable

VI. Precautions for Bearing Repair

Damage Assessment Determine the extent of bearing damage and choose the appropriate repair method
Repair Process Selection Avoid over-repair, which could affect the bearing's original performance
Material Matching Choose repair materials suitable for working conditions to ensure repair quality
Inspection and Testing After repair, perform dimensional inspection and hardness testing to ensure the repaired bearing meets usage requirements
Regular Maintenance Repaired bearings still need regular inspection and maintenance to prevent secondary damage

VII. Bearing Repair Case Analysis

Case 1 Wind turbine main bearing repair
Problem Bearing raceway surface peeling, affecting equipment operation
Repair Method Using electroplating technology to restore raceway dimensions
Repair Result Extended bearing lifespan by more than 3 years, reducing maintenance costs

Case 2 Metallurgical equipment bearing repair
Problem High-temperature environment caused lubrication failure and damage to the bearing rolling elements
Repair Method Replacing rolling elements and using high-temperature wear-resistant repair adhesives
Repair Result Restored bearing operation and improved high-temperature resistance

Bearing repair is a high-tech requirement. Properly selecting bearing repair methods, materials, and equipment can significantly extend bearing service life and reduce equipment operating costs. If you would like to learn more about bearing system solutions, feel free to contact us. Nationwide hotline: 4006-808-505, Bearing technical personnel in this industry: Manager Li: 13657445999.

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